The two children protagonists in Mark Twain's two Adventures contribute much to the success of the two novels. They helped Mark Twain unify the themes of the two stories. Actually, Mark Twain was not always satisfied with the character, Tom, who belongs to the civilized society, and thus he created his ideal image, Huck, who has his own natural instincts and sweet innocence, and can resist temptations from the traditional society.

liuxuepaper :马克吐温的两篇冒险小说大获成功，归因于书中两个儿童冒险家的冒险故事。他们分别在两篇小说中起到了连接故事主线的作用。其实，马克吐温本人对这两个主角的塑造并不满意，故事的一个主人公，汤姆是个现代文明社会中的一员，他因此而成为理想形象代言人；另个主角，哈克，天性纯良，能脱俗而不受传统社会之诱惑。

Huckleberry Finn was finished by Mark Twain, eight years after Tom Sawyer was published. In the meantime, Mark Twain witnessed industrialization engulf America's every corner step by step. Reality together with the valuable experience of creating Tom Sawyer accelerated Mark Twain's rapid growth in literary composition. From liuxuepaper.com.

Born as the masterpiece of Mark Twain, Huckleberry Finn's setting was no longer confined to the small village as Tom Sawyer did, but changed to the great Mississippi River, which not only contrasts with the land world filled with troubles, but also presents a moving panorama for the exploration of the American society. Although both Adventures are enduring and extraordinary works, Huckleberry Finn surpasses Tom Sawyer in theme and art.